Study On Infrared Gas-Filter Correlation Spectrometer For Measuring Low-Concentration Methanol Gases

Soyoung Cha; Peter A. Gabele

doi:10.1117/12.7974002

1 December 1986 Study On Infrared Gas-Filter Correlation Spectrometer For Measuring Low-Concentration Methanol Gases

Soyoung Cha, Peter A. Gabele

Author Affiliations +

Optical Engineering, Vol. 25, Issue 12, 251299 (December 1986). https://doi.org/10.1117/12.7974002

Abstract

A gas-filter correlation spectrometer that employed a wide spectral band of infrared radiation and gas-filter cell has been built and successfully tested to measure methanol concentrations up to 113 ppm. The instrument demonstrates a detection limit of approximately 1.0 um. The interference of nonmethanol gases is negligible when automobile exhausts are used for the test. The most prominent, though not serious, problem appears to be the signal drift, which is believed to be improved by thermally insulating the instrument. The analyzer demonstrated its capability for real-time analysis of emissions from methanol-fueled vehicles due to its simplicity and fast response as compared with wet chemical methods.

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Soyoung Cha and Peter A. Gabele "Study On Infrared Gas-Filter Correlation Spectrometer For Measuring Low-Concentration Methanol Gases," Optical Engineering 25(12), 251299 (1 December 1986). https://doi.org/10.1117/12.7974002

Published: 1 December 1986

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